Floodplain Mapping Projects

FEMA has available several services for different phases of a mapping project. Preliminary, Pending and Effective products can be downloaded on from the Map Service Center. FEMA also maintains several map viewers:

National Flood Hazard Layer - displays the effective digital data
> Flood Map Changes Viewer  - includes the Preliminary and Pending digital map data, with a Changes Since Last FIRM layer that compares the Preliminary/Pending data with the effective data


KDA maintains project-specific map viewers for active projects that are based on the same digital data. The web links are included on the project pages below. 

Nemaha County


Nemaha County Preliminary Maps are approaching the adoption phase and have their Letter of Final Determination (LFD) scheduled for February 2, 2022. If that LFD remains, it will become effective August 2, 2022


Nemaha County Project Review Web Map

Nemaha County CCO Meeting Presentation 1-19-2021

Nemaha County Contact Information

Nemaha County Flood Risk Review Meeting 10-8-2019

Nemaha County Flood Risk Review Handout

Nemaha County Kickoff Meeting Handout 11-15-2018

Nemaha County Kickoff Meeting Presentation 11-15-2018



Nemaha County Scoping Map

Unsure which watershed you are in?  Use the following link to find out.
Kansas HUC 8 Watershed Map

Or reference the map below for Custom Watershed project areas.

Project Reference Map

Use this page to find relevant information on floodplain mapping projects.  Click on the map below to view current or proposed floodplain mapping projects.  Use the Kansas Floodplain Map Viewer for current effective floodplains.

Project Status January 14, 2022